The Siemens 3VA2220-7MS32-0HH0 is a SENTRON molded case circuit breaker (MCCB) rated for 200 A continuous current with a 3-pole configuration, designed specifically for starter protection duty. Its ETU310M electronic trip unit provides adjustable overload and short-circuit protection for motor branch circuits, while the integrated shunt trip (STL) allows remote tripping via a control signal. The breaker carries a 330 kA interrupting rating at 240 V, scaling down to 242 kA at 415/440 V, 187 kA at 500 V, and 52.5 kA at 690 V — these figures govern its suitability for high-fault installations where upstream coordination demands full-rated SCCR headroom.
Thermal derating and enclosure fit
The 200 A rating holds at 40 °C, 45 °C, and 50 °C without derating; above 50 °C it drops linearly to 192 A at 55 °C, 188 A at 60 °C, 184 A at 65 °C, and 180 A at 70 °C. In a furnace or high-ambient panel, that 180 A floor at 70 °C still leaves headroom for a 150 A motor load, but the thermal curve must be factored into the panel's heat budget — 75 W maximum power loss at rated current is the number to use for enclosure ventilation sizing. The 86 mm depth, 105 mm width, and 181 mm height fit the standard SENTRON 3VA mounting footprint, compatible with the same busbar and lug kits used on the 3VA1 frame.
Auxiliary and trip options
The breaker ships with a shunt trip (STL) for remote undervoltage or emergency-stop tripping, plus 2 auxiliary switches and a separate trip alarm switch (HQ configuration). No undervoltage release, no communication module, no phase-failure detection, and no ground-fault monitoring are included — those functions must be added externally if the application requires them. The basic switch subassembly is order code 3VA2220-7MS32-0AA0, and the integrated auxiliary trip is 3VA9688-0BL30, both serviceable separately.
Environmental and endurance
Operating temperature range spans -25 °C to 70 °C, with storage from -40 °C to 80 °C. Mechanical endurance is rated at 20,000 operations — adequate for motor-starting duty where the breaker cycles infrequently compared to a contactor. The 800 V rated insulation voltage (Ui) covers most low-voltage distribution systems up to 690 V phase-to-phase.